If he means the overall level is the best, he may be right. Obviously USA is the best team, and Argentina's great too, but there's a lot of teams from around the world that bring the level down.
It's the same as in soccer, the European championship's got a better overall level, due to not having some Asian or African teams that aren't as good as some European or American teams that don't qualify.

But I really doubt this was what Lakas meant.

EuroBasket is way harder than the Olympics, where you have 3 games that are 30-40 point blowouts right on your group stage schedule.

Americans are totally delusional in how they think the Olympics is as hard a competition as the EuroBasket.

Slovenia, Serbia, Turkey, Germany teams like that could not even make it past top 7 finish at EuroBasket. It is way harder a tournament than the Olympics, which is just totally overrated because Americans and NBA fans just hype it up like they do anything they think is NBA related.